I see a LOT of people claiming this game sucks, and it seems that the hate is based solely on its cover art. It's kinda understandable just looking at the box AND the title, it looks like just another braindead generic grey-brown FPS... But it's actually really great.
There's actually original weapons, solid and unique gameplay, and it actually has fun with the genre, it's not just "take cover and shoot stuff". I love the scoring system, there's a ton of ways to kill enemies (and half the fun is figuring out all the ways you can kill enemies and what the different killshots are... and how to maximize your score) and the story even manages to be half-decent at parts.
Love this game, I feel it gets undue hate for no reason.